Originally Posted by NewbieRunner

Yes, they serve a Japanese meal in C and F on routes to/from Japan but as far as I know it is not served on other routes. If you opt for a Western meal you only have a choice of two main dishes to choose from. The printed menu always states that a Japanese meal is available to pax who pre-order it but in reality there's no need to pre-order especially if you are SEN.

BTW it isn't realy a bento box - some examples here.